Volume normalization modes
Volume Normalization Modes says whether, and how, an audio platform adjusts the level of ads to match the content around them. Sellers send it in Audio.nvol, so buyers know whether their creative will play at the level it was mixed or be adjusted by the publisher.
Values
| Value | Name | What it means |
|---|---|---|
0 | None | No normalization: the ad plays at whatever level it was delivered. |
1 | Ad Volume Average Normalized to Content | The ad's average volume is adjusted to match the content's average volume. |
2 | Ad Volume Peak Normalized to Content | The ad's peak volume is adjusted to match the content's peak volume. |
3 | Ad Loudness Normalized to Content | The ad's loudness, a perceptual measure rather than a raw signal level, is matched to the content. |
4 | Custom Volume Normalization | The platform applies its own normalization method; ask the seller how it works. |
Fields that use this list
How to use it
The field and its five values arrived with the Audio object in OpenRTB 2.4 and have not changed since. A jump in loudness between content and ad is one of the most common listener complaints in audio, and buyers that cannot control every mix may prefer normalized inventory. Value 3 is the only one that matches perceived loudness rather than a signal level.
Common mistakes
- Sending 0 when the stream is normalized by a downstream player the seller does not control. If the seller does not know, leave the field out.
- Sending 4 without telling buyers what the custom method is. The value is only useful with documentation behind it.
Validation
On OpenRTB 2.6 snapshots, RTBlint reports a value outside this list as openrtb.value.invalid. Paste a request into the tester to check the values you send.
Related lists
- Plcmt subtypes (video)
- Creative subtypes (audio and video)
- Playback methods
- Playback cessation modes
- Start delay modes
- Linearity modes
- Companion types
- Delivery methods
- Feed types
- Pod deduplication
- Pod sequence
- Slot position in pod
- Production qualities
All lists are on the enumerated lists index.